Fig. 1. Micro-nano structure of graphene film. (a) Graphene text pattern on a glass substrate; (b) graphene spiral pattern on a glass substrate; (c) arrays of graphene lines on a glass substrate; (d) circuit pattern on a SiO2/Si substrate[22]
Fig. 2. Experimental results. (a) Optical images of CW laser irradiated spots at various laser powers[31]; (b) SEM and AFM images of periodic surface structures[32]
Fig. 3. Schematics illustration of the procedures to produce the graphene flower using femtosecond laser pulses[34]. (a) Graphene oxide sheets; (b) reduced graphene sheets; (c) graphene film by filtration of reduced graphene sheets; (d) a graphene microflower produced with a single laser pulse; (e) large-area surface patterning by fs laser direct writing; (f) large-area uniform flower patterns on the surface of a graphene film